Sorry first, last English lesson is about 40 Years ago. So I built a photoline to see it. Usefull for comparison a rigid axle, a original axle and a differential axle. The handling will be much more better. And you see in the bronze part, there you can adjust the differential from soft to hard. Soft is my choice. Also I Use some aloy rims from KENON and wires made from foam rubber. there is the best grip. The aloy rims are normaly used by Mini-z. So enjoy the pictures.